Swift2 iOS9-如何在我的代码中获取自定义图像而不是默认注释红色图钉

Question

Here is my code. I have tried all the solutions available but I am not able to put image I wish to instead of the default annotation red pin in my code.

import MapKit

class ViewController: UIViewController, MKMapViewDelegate {

@IBOutlet var map: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()

    var location = CLLocationCoordinate2DMake(18.956449, 72.810597)

    var span = MKCoordinateSpanMake(0.009, 0.009)
    var region = MKCoordinateRegion(center: location, span: span)

    map.setRegion(region, animated: true)

    var annotation = MKPointAnnotation()
    annotation.coordinate = location
    annotation.title = "Wilson College"
    annotation.subtitle = "Commerce College"

    map.addAnnotation(annotation)
    print("showing on map")

    mapView(map, viewForAnnotation: annotation)


}



func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {

    let identifier = "MyPin"
    print("inside viewForAnnotation")
    if annotation.isKindOfClass(MKUserLocation) {
        return nil
    }

    let detailButton: UIButton = UIButton(type: UIButtonType.DetailDisclosure)

    // Reuse the annotation if possible
    var annotationView = mapView.dequeueReusableAnnotationViewWithIdentifier(identifier)

    if annotationView == nil
    {
        annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: "pin")
        annotationView!.canShowCallout = true
        annotationView!.image = UIImage(named: "VRtest.png")
        annotationView!.rightCalloutAccessoryView = detailButton
        print("editing annotation")
    }
    else
    {
        annotationView!.annotation = annotation
    }

    return annotationView
}

Any help is appreciated. thank you

Answer 1

What do you want is to customize the default annotation? if YES, you can refer this post How to create Custom MKAnnotationView and custom annotation title and subtitle

Here is the example in Swift 2

class MapViewController: UIViewController {


    @IBOutlet weak var mapView: MKMapView!

    let initialLocation = CLLocation(latitude: 34.074094, longitude: -118.396329)
    let regionRadius: CLLocationDistance = 1000

    func centerMapOnLocation(location: CLLocation) {
        let coordinateRegion = MKCoordinateRegionMakeWithDistance(location.coordinate,
            regionRadius * 2.0, regionRadius * 2.0)
        self.mapView.setRegion(coordinateRegion, animated: true)
    }

    override func viewDidLoad() {
        self.mapView.delegate = self
        self.centerMapOnLocation(initialLocation)

        let location = CLLocationCoordinate2D(latitude: 34.074094, longitude: -118.396329)
        let annotation = CustomAnnotation(coordinate: location, imageName: "pinIcon", title: "Test", subtitle: "Detail", enableInfoButton: false)

        self.mapView.addAnnotation(annotation);
    }
}

extension MapViewController: MKMapViewDelegate {
    func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? {

        if (annotation is MKUserLocation) {
            return nil
        }

        let pinIdentifier = "pinIdentifier"
        var view: MKAnnotationView
        if (annotation.isKindOfClass(CustomAnnotation)) {
            if let dequeuedView = mapView.dequeueReusableAnnotationViewWithIdentifier(pinIdentifier)
                as MKAnnotationView? {
                    dequeuedView.annotation = annotation
                    view = dequeuedView
            } else {
                view = MKAnnotationView(annotation: annotation, reuseIdentifier: pinIdentifier)
                view.canShowCallout = true

                //Set custome image
                let customAnnotation = annotation as! CustomAnnotation
                view.image = UIImage(named:customAnnotation.imageName!)
            }

            return view
        }

        return nil
    }

}

class CustomAnnotation : NSObject, MKAnnotation {

    var coordinate: CLLocationCoordinate2D
    var imageName: String?
    var title: String?
    var subtitle: String?
    var enableInfoButton : Bool

    init(coordinate: CLLocationCoordinate2D, imageName: String, title: String, subtitle: String, enableInfoButton : Bool) {
        self.coordinate = coordinate
        self.imageName = imageName
        self.title = title
        self.subtitle = subtitle
        self.enableInfoButton = enableInfoButton;
    }
}

This is my custom image displaying on the screen